Template:Example table with computations, with optional substitution

component population
({{{date}}} est.)
area
(km²)
pop. dens.
(per km²)
currency
Aruba 999 999 1 Aruban Florin
Netherlands 999 999 1 euro
Netherlands Antilles 999 999 1 Netherlands Antilles Gulden
total 2,997 2,997 1

999 is a dummy value, see the talk page where values are filled in.